public class MGF1BytesGenerator extends java.lang.Object implements DerivationFunction
Modifier and Type | Field and Description |
---|---|
private Digest |
digest |
private int |
hLen |
private byte[] |
seed |
Constructor and Description |
---|
MGF1BytesGenerator(Digest digest) |
Modifier and Type | Method and Description |
---|---|
int |
generateBytes(byte[] out,
int outOff,
int len)
fill len bytes of the output buffer with bytes generated from
the derivation function.
|
Digest |
getDigest()
return the underlying digest.
|
void |
init(DerivationParameters param) |
private void |
ItoOSP(int i,
byte[] sp)
int to octet string.
|
private Digest digest
private byte[] seed
private int hLen
public MGF1BytesGenerator(Digest digest)
digest
- the digest to be used as the source of generated bytespublic void init(DerivationParameters param)
init
in interface DerivationFunction
public Digest getDigest()
getDigest
in interface DerivationFunction
private void ItoOSP(int i, byte[] sp)
public int generateBytes(byte[] out, int outOff, int len) throws DataLengthException, java.lang.IllegalArgumentException
generateBytes
in interface DerivationFunction
DataLengthException
- if the out buffer is too small.java.lang.IllegalArgumentException